ch11-p039 - 39. (a) A particle contributes mr2 to the...

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39. (a) A particle contributes mr 2 to the rotational inertia. Here r is the distance from the origin O to the particle. The total rotational inertia is () () ( ) 22 2 2 32 3 2 14 14(2.3 10 kg)(0.12 m) 4.6 10 kg m . I m dm d m d =++ = = × (b) The angular momentum of the middle particle is given by L m = I m ω , where I m = 4
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